extern int wait_reply(int fd, int tmo);
extern int connect_monitor(char *devname);
extern int ping_monitor(char *devname);
+extern int block_subarray(struct mdinfo *sra);
+extern int unblock_subarray(struct mdinfo *sra, const int unfreeze);
+extern int block_monitor(char *container, const int freeze);
+extern void unblock_monitor(char *container, const int unfreeze);
+extern int fping_monitor(int sock);
extern int ping_manager(char *devname);
#define MSG_MAX_LEN (4*1024*1024)